# Questions tagged [gre-exam]

For questions relevant to the general or subject-specific Graduate Record Examination, abbreviated GRE.

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### $X+Y <0$ and $Y - X >0$. Can we determine which of $Y$ and $0$ is bigger? (GRE question)

Given $X + Y < 0$, and $Y - X > 0$. Let quantity $A$ be $Y$, and quantity $B$ be $0$. Which of the following is true: A. $A$ is always greater. B. $B$ is always greater. C. both are always the ...
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### A simple GRE data-analysis question - but I dont know what it is asking

It is a GRE data analysis question. I don't if I am dumb in Math, or in English. But I could not understand what is the question a want me to answer. Please give me a hint.
• 269
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### How many 3-digit positive integers are odd and do not contain digit 5?

It is a GRE question. And it has been answered here. But I still want to ask it again, just to know why I am wrong. The correct is 288. My idea is, first I get the total number of 3-digit integers ...
• 269
189 views

### ¿Mathematical induction GRE math?

Im studing for the GRE math subject test...i can´t get the followin problem: Using Mathematical Induction, show that it is possible to color with only two colors the regions formed by n lines in the ...
611 views

### Advice for GRE exam (Surface area of cylinder)

I need from experienced people such advice, for example, it is given on the exam that we have cylinder with base radius $3$ and height $4$. The question is to calculate the surface area. Generally, ...
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### figure on scale

generally it is well known that angle inscribed by diameter is $90$,but because on GRE figures are not drawn on scale,that why i want to make sure that my assumption about $y$ is $90$ ,...
• 267
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### quantity comparative test on GRE

i would like to compare two quantity,first is $-3^4$ and $(-3)^4$,second one is clearly $81$,but what about second on?is it $-3\cdot-3\cdot-3\cdot-3$ ? $-3\cdot3\cdot3\cdot3$?there could be ...
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### Probability and Statistics 2

John invites 12 friends to a dinner party, half of which are men. Exactly one man and one woman are bringing desserts. If one person from this group is selected at random, what is the probability that ...
4k views

### formula for finding perimeter of half circle

i was looking for this problem http://www.majortests.com/gre/problem_solving_expl.php?exp=50313039243130243330 and was surprised if it is correct,we know that circumference or perimeter of circle ...
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1 vote
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### GRE test prep question [LCM and divisors]

Let $S$ be the set of all positive integers $n$ such that $n^2$ is a multiple of both $24$ and $108$. Which of the following integers are divisors of every integer $n$ in $S$ ? Indicate all such ...
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### How many zeroes at the end of $3^34^45^56^6 - 3^64^55^46^3$?

The quantity $3^34^45^56^6 - 3^64^55^46^3$ will end in how many zeros? This is a GRE Practice question and I have to do it without using a calculator. Can anyone help me on this?
939 views

### angle of inscribed triangle

let us consider following problem: we have inscribed triangle,like this we are asked to determine if given $x$ is acute or obtuse,$O$ is center of circle,as i know if $CB$ would be diameter,...
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1 vote
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### How to solve a ratio question

Studying for the GRE. In the GRE guide, it says that If the ratio is $2x:5y$, and this equals the ratio $3:4$, what is the ratio of $x:y$? I tried cross multiplying but I don't get the answer. It ...
964 views

### Book on Geometry (GRE Math Subject Test)?

I don't believe that this is a duplicate of any question that is on this site. I am currently searching for a geometry textbook which covers (at least) material for the GRE Math Subject Test. I have ...
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1 vote
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### How do I find the probability of these independent events

The following is taken from the ETS math review for the GRE: Let A, B, C, and D be events for which P(A or B)=0.6, P(A)=0.2, P(C or D)=0.6, and P(C)=0.5 The events A and B are mutually exclusive, and ...
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1 vote
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### GRE Permutation and geometry question

if you join all the vertices of a heptagon, how many quadrilaterals will you get? How many heptagons can be drawn by joining the vertices of a polygon with 10 sides? A polygon has 20 diagonals,how ...
• 241
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### GRE Probability question

How many 3-digit positive integers are odd and do not contain the digit 5 ? My attempt: 100-999 3 -digit integers, 900/2=450 odd numbers. Now how to calculate odd numbers which do not contain digit 5 ...
• 241
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### Explicitly finding the sum of $\arctan(1/(n^2+n+1))$

This is from a GRE prep book, so I know the solution and process but I thought it was an interesting question: Explicitly evaluate $$\sum_{n=1}^{m}\arctan\left({\frac{1}{{n^2+n+1}}}\right).$$
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